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What is the time increment for timestamps in TOTP?

  1. 10 seconds

  2. 30 seconds

  3. 1 minute

  4. 5 minutes

The correct answer is: 30 seconds

The time increment for timestamps in Time-based One-Time Password (TOTP) is set at 30 seconds. TOTP is a common algorithm used for two-factor authentication, generating a temporary code based on the current time and a shared secret key. Each TOTP code remains valid for a limited time, typically a 30-second window, after which a new code is generated. This time-based method enhances security by ensuring that even if a code is intercepted, it will only be usable for a brief period, reducing the risk of unauthorized access. Other time increments, such as 10 seconds, 1 minute, and 5 minutes, are not standard for TOTP and would compromise the effectiveness and usability of the authentication method if used.